1. Nuclear Regulatory Commission. Regulatory Guide 8.39: Release of patients administered radioactive materials. NRC; 1997; 8.39-1–8.39-19.
2. Transperineal percutaneous iodine-125 implantation for prostatic carcinoma using transrectal ultrasound and template guidance;Blasko;Endo/Hypertherm,1987
3. National Council on Radiation Protection and Measurements. Limitation of exposure to ionizing radiation. NCRP; 1993. Report No. 116.